5 papers
Massive runaway star HD 254577: the pre-supernova binary companion to the progenitor of the supernova remnant IC 443
B. Dinçel, G. Paylı, S. K. Yerli +9
The secondaries of the massive binary systems can be found as runaway stars after being ejected due to the supernova (SN) of the more massive component. We search for such stars in…
Radial Velocity Monitoring and Analysis of Gaia Astrometry of Selected Intermediate Mass Stars to Constrain Their Multiplicity Status
J. Bätz, M. Mugrauer, K. -U. Michel +5
We present new radial velocity measurements of 13 selected intermediate mass stars (2 - 6 M). The measurements were performed between 29 April and 6 September 2024 at the U…
Identifying the secondary jet in the RadioAstron image of OJ~287
Mauri J. Valtonen, Lankeswar Dey, Staszek Zola +26
The 136 year long optical light curve of OJ~287 is explained by a binary black hole model where the secondary is in a 12 year orbit around the primary. Impacts of the secondary on…
Gaia search for stellar companions of TESS Objects of Interest V
M. Mugrauer, A. -K. Kollak, L. Pietsch +1
In this paper we present the latest results of our ongoing multiplicity survey of (Community) TESS Objects of Interest, using astrometry and photometry from the latest data release…
The Mira discovery problem -- Observations by David Fabricius in 1596 and 1609 (and by others before?): Positional accuracy, brightness, color index, and period
R. Neuhäuser, D. L. Neuhäuser, M. Mugrauer +2
The pulsating variable star Mira (omikron Ceti) was observed by David Fabricius (Frisia) in 1596 and 1609. We review suggested previous detections (e.g. China, Hipparchos). We anal…